Bridge-lifting and lowering mechanism of a mechanized bridge

Abstract

The present invention discloses a bridge lifting and lowering mechanism for a mechanized bridge, which relates to the technical field of emergency bridge erection devices and includes: a bridge lifter assembly and a stopper; both the bridge lifter assembly and the stopper are fixed on an external flipping mechanism. The bridge lifter assembly includes: a hook plate and a limit pin arranged on the hook plate. The bridge lifter assembly lifts or lowers the bridge through the hook plate. When lifting, the bridge span is carried on the hook plate. The stopper and the hook plate cooperate to limit the vertical movement of the lifted bridge span, and the limit pin limits the sliding of the lifted bridge span in the horizontal plane; when lowering the bridge, the bridge span is disengaged from the hook plate.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency bridge erection devices, and particularly to a bridge picking and lowering mechanism for a mechanized bridge. Background Art

[0002] Existing mechanized bridges use hydraulic mechanisms to automatically pick and lower the bridge, which are mainly achieved through two ways: 1) adding a tongue-shaped arm and an oil circuit to the erection system to achieve the bridge picking and lowering actions; 2) adding mechanisms such as slides and roller groups to cooperate to achieve the bridge picking and lowering. Although the above two methods have a high degree of automation, the system is relatively complex, the processing difficulty is large, and at the same time, the cost of the mechanized bridge is increased. Summary of the Invention

[0003] In view of this, the present invention provides a bridge picking and lowering mechanism for a mechanized bridge, which not only meets the usage function requirements of quickly picking and lowering the bridge of the mechanized bridge, but also has the characteristics of simple structure and easy operation, and is beneficial to significantly reducing the manufacturing cost.

[0004] The technical solution of the present invention is: a bridge picking and lowering mechanism for a mechanized bridge, including: a bridge pick-up assembly and a stopper; both the bridge pick-up assembly and the stopper are fixed on an external flipping mechanism. The bridge pick-up assembly includes: a hook plate and a limit pin arranged on the hook plate. The bridge pick-up assembly picks up or lowers the bridge through the hook plate. When picking up, the bridge span is carried on the hook plate. The stopper and the hook plate cooperate to limit the vertical movement of the picked-up bridge span, and the limit pin limits the sliding of the picked-up bridge span in the horizontal plane; when lowering the bridge, the bridge span is separated from the hook plate.

[0005] Preferably, the limit pin is formed by a pin body and a spring assembly. One end of the spring assembly is connected to the pin body, and the other end is arranged in the hook plate. When the spring assembly extends relative to the hook plate, it drives the pin body to insert into the lower surface of the end of the bridge span.

[0006] Preferably, the stopper includes: a clamping block, and the clamping block and the hook plate respectively limit the up and down movement of the picked-up bridge span in the vertical direction.

[0007] Preferably, the bridge pick-up assembly further includes: a bracket. Two or more of the brackets are parallel to each other and fixed on one side of the flipping mechanism. Each bracket is provided with a hook plate. One end of the hook plate is fixed on the bracket, and the other end can pick up or lower the bridge.

[0008] Preferably, the stopper further includes: a mounting seat. Two mounting seats are fixed on the other two opposite sides of the flipping mechanism, and the two opposite sides are perpendicular to the side where the bracket is located. The clamping block is fixedly connected to the mounting seat.

[0009] Preferably, the hook plate is of an L-shaped structure.

[0010] Preferably, the bridge picking-up assembly further includes: brackets. Two or more of the brackets are parallel to each other and fixed on one side of the flipping mechanism. A hook plate is installed on each bracket. The corner of the hook plate is rotatably connected to the bracket. One end of the hook plate is detachably connected to the bracket, and the other end can pick up or lower the bridge.

[0011] Preferably, a limiting protrusion is provided at the end of the bridge-picking-up end of the hook plate.

[0012] Preferably, it further includes: a bridge-lowering steel wire rope and a bridge-unfolding steel wire rope. One end of each of the bridge-lowering steel wire rope and the bridge-unfolding steel wire rope is connected to the bridge span, and the other end is connected to the flipping mechanism.

[0013] Beneficial effects:

[0014] 1. For the mechanized bridge picking-up and lowering mechanism proposed by the present invention, the hook plate in the bridge picking-up assembly is used to pick up or lower the bridge. The picked-up bridge span is limited in horizontal plane sliding by the limit pin in the bridge picking-up assembly, and the picked-up bridge span is limited in vertical up and down movement by the limiter and the hook plate together. It can quickly pick up and lower the bridge, and has a simple structure, which is convenient for processing production and maintenance. It is a low-cost and easy-to-implement technical solution. It does not require electro-hydraulic components, and the quick picking up or lowering of the bridge span can be realized through simple manual operations.

[0015] 2. In the present invention, the setting of the limit pin, in cooperation with the hook plate and the clamping block of the limiter, can effectively limit the sliding of the picked-up bridge span in the horizontal plane.

[0016] 3. In the present invention, the hook plate is designed as an L-shaped structure, and its corner is first rotatably connected to the bracket, and then one end of the hook plate is fixed to the bracket as needed, and the other end is used to pick up or lower the bridge span. It is convenient to pick up or lower bridge spans of different heights, and can effectively reduce the space occupancy rate of the straight plate-shaped hook plate.

[0017] 4. The limiting protrusion provided at the bridge-picking-up end of the hook plate in the present invention is convenient for quickly picking up the bridge span during bridge picking-up and for locally limiting the bridge span during the bridge lowering process.

[0018] 5. The specific setting of the bridge-lowering steel wire rope and the bridge-unfolding steel wire rope in the present invention, in cooperation with the bridge picking-up assembly, can realize the stable control of the picking-up or lowering action of the bridge span. Description of the drawings

[0019] Figure 1 It is a three-dimensional view of the mechanized bridge picking-up and lowering mechanism of the present invention.

[0020] Figure 2 It is a left view of the mechanized bridge picking-up and lowering mechanism of the present invention.

[0021] Figure 3This is a schematic structural diagram of the bridge lifter assembly in the present invention.

[0022] Figure 4 This is a schematic structural diagram of the stopper in the present invention.

[0023] Figure 5 This is a schematic diagram of the process of lowering the bridge in the present invention.

[0024] Figure 6 This is a schematic diagram of the process of lifting the bridge in the present invention.

[0025] Among them, 1 - stopper, 2 - bridge lifter assembly, 3 - flipping mechanism, 4 - bracket, 5 - movable pin, 6 - connecting pin, 7 - limit pin, 8 - hook plate, 9 - fixing pin, 10 - mounting seat, 11 - clamping block, 12 - bridge lowering steel wire rope, 13 - bridge span, 14 - bridge unfolding steel wire rope. Specific embodiments

[0026] The following combines the accompanying drawings and gives examples to describe the present invention in detail.

[0027] Embodiment 1:

[0028] This embodiment provides a bridge lifting and lowering mechanism for a mechanized bridge, which not only meets the usage function requirements of quickly lifting and lowering the mechanized bridge, but also has the characteristics of simple structure and easy operation, and is beneficial to significantly reducing the manufacturing cost.

[0029] As Figure 1 and 2 shown, the bridge lifting and lowering mechanism includes: a bridge lifter assembly 2 and a stopper 1; both the bridge lifter assembly 2 and the stopper 1 are fixed on the external flipping mechanism 3; among them, as Figure 3 shown, the bridge lifter assembly 2 includes: a bracket 4, a movable pin 5, a connecting pin 6, a limit pin 7 and a hook plate 8; as Figure 4 shown, the stopper 1 includes: a mounting seat 10, a clamping block 11 and a fixing pin 9.

[0030] The connection relationship of the bridge-lifting and lowering mechanism is as follows: The flipping mechanism 3 serves as the base, and two or more brackets 4 are parallel to each other and fixed on one side of the flipping mechanism 3. For the bridge-lifting assembly 2, the brackets 4 play an overall supporting role. The hook plate 8 has an L-shaped structure, and the connecting pin 6 rotatably connects the hook plate 8 to the bracket 4 from the corner of the hook plate 8 (the connecting pin 6 serves as the rotation axis of the hook plate 8). The movable pin 5 can be manually inserted and removed on the bracket 4, and one end of the hook plate 8 is fixed on the bracket 4. The limit pin 7 is arranged on the hook plate 8 and is formed by a pin body and a spring assembly. One end of the spring assembly is connected to the pin body, and the other end is fixed in the mounting hole opened on the hook plate 8. The spring assembly can be telescopically adjusted relative to the hook plate 8. When the hook plate 8 performs the bridge-lifting action and the end of the bridge span 13 reaches the position, the limit pin 7 extends upward and is inserted into the jack arranged on the lower surface of the end of the bridge span 13 to limit the sliding of the bridge span 13 in the horizontal plane and prevent the bridge span 13 from sliding and falling off in the horizontal plane. When lowering the bridge, the limit pin 7 retracts downward to release the horizontal limit on the bridge span 13, and the hook plate 8 rotates downward around the connecting pin 6, so that the bridge span 13 slides off the hook plate 8, and with the cooperation of the bridge-lowering steel wire rope 12, the bridge-lowering action is smoothly completed.

[0031] Two mounting seats 10 are fixed on the other two opposite sides of the flipping mechanism 3, and the two opposite sides are perpendicular to the side where the brackets 4 of the bridge-lifting assembly 2 are located. The mounting seats 10 play an overall supporting role for the limiter 1. The block 11 is fixedly connected to the mounting seat 10 through the fixing pin 9 and cooperates with the bridge-lifting assembly 2 during the bridge-lifting and lowering processes to limit the bridge span 13. At the same time, one end of both the bridge-unfolding steel wire rope 14 and the bridge-lowering steel wire rope 12 is connected to the bridge span 13, and the other end is connected to the flipping mechanism 3. During the bridge-lifting and lowering action processes, the bridge span 13 can be lifted or lowered through the cooperation of the bridge-unfolding steel wire rope 14 and the bridge-lowering steel wire rope 12.

[0032] In this embodiment, when lifting the bridge, the end of the bridge span 13 is enclosed between the limiter 1 and the hook plate 8. The limiter 1 and the hook plate 8 respectively limit the vertical upward and downward movement of the lifted bridge span 13. During the unfolding or folding process of the bridge span 13, and when the limit pin 7 is in the retracted state, the bridge span 13 rotates around itself within the space enclosed by the limiter 1 and the hook plate 8, and the space enclosed by the limiter 1 and the hook plate 8 does not limit the movement of the bridge span 13 along its own length direction. Among them, during the bridge-lowering process, the bridge span 13 generally needs to be unfolded first and then lowered. During the bridge-lifting process, the bridge span 13 generally needs to be lifted first and then folded.

[0033] In this embodiment, two or more pin holes are provided at the end of the hook plate 8 fixed on the bracket 4, and the movable pin 5 can be inserted into any one of the pin holes as needed to fix the hook plate 8.

[0034] In this embodiment, a limiting protrusion is provided at the end of the opposite end of the hook plate 8 fixed to the bracket 4 (i.e., the end for picking up or lowering the bridge), which facilitates quickly picking up the bridge span 13 during bridge picking and locally limiting the bridge span 13 during the bridge lowering process.

[0035] During use, as Figure 5 shown, during the bridge lowering process, after the mechanized bridge deployment action is completed, start lowering the bridge, tighten the bridge lowering steel wire rope 12, lift the bridge span 13, so that the bridge picking assembly 2 is in a non-loaded state, manually assist in pulling out the movable pin 5, and make the hook plate 8 rotate around the connecting pin 6; after the hook plate 8 rotates in place, the hook plate 8 releases the limit on the hook plate 8, releases the bridge lowering steel wire rope 12 until the bridge span 13 touches the ground, and the bridge lowering is completed;

[0036] As Figure 6 shown, during the bridge picking process, after the mechanized bridge erection vehicle is centered and in place, connect the bridge lowering steel wire rope 12 to the bridge span 13, tighten the bridge lowering steel wire rope 12, lift the bridge span 13 to a specified height, manually assist in rotating the hook plate 8 around the connecting pin 6 to a specified position, and use the movable pin 5 to fix the hook plate 8 on the bracket 4; then tighten and position the bridge span 13 through the bridge unfolding steel wire rope 14. After the bridge span 13 is in place, it is surrounded and limited by the stopper 1, the hook plate 8 and the limit pin 7, and the bridge picking is completed.

[0037] Embodiment 2:

[0038] Different from Embodiment 1, one end of the hook plate 8 is fixed to the bracket 4, and the other end can be any structure capable of hooking the end of the bridge span 13. With the cooperation of the bridge lowering steel wire rope 12, the bridge span 13 is hooked at the end of the hook plate 8 or removed from the end of the hook plate 8.

[0039] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge lifting and lowering mechanism for a mechanized bridge, characterized in that, Comprising: A bridge-lifting assembly (2) and a stopper (1); both the bridge-lifting assembly (2) and the stopper (1) are fixed on an external flipping mechanism (3). The bridge-lifting assembly (2) includes a hook plate (8) and a limit pin (7) arranged on the hook plate (8). The bridge-lifting assembly (2) picks up or lowers the bridge through the hook plate (8). When picking up, the bridge span (13) is carried on the hook plate (8). The stopper (1) and the hook plate (8) cooperate to limit the vertical movement of the picked-up bridge span (13), and the limit pin (7) limits the sliding of the picked-up bridge span (13) in the horizontal plane. When lowering the bridge, the bridge span (13) disengages from the hook plate (8). The hook plate (8) is of an L-shaped structure. The bridge-lifting assembly (2) further includes brackets (4). Two or more of the brackets (4) are parallel to each other and fixed on one side of the flipping mechanism (3). One hook plate (8) is installed on each bracket (4). The corner of the hook plate (8) is rotatably connected to the bracket (4). One end of the hook plate (8) is detachably connected to the bracket (4), and the other end can pick up or lower the bridge. The limit pin (7) is formed by a pin body and a spring assembly. One end of the spring assembly is connected to the pin body, and the other end is arranged in the hook plate (8). When the spring assembly extends relative to the hook plate (8), it drives the pin body to insert into the lower surface of the end of the bridge span (13).

2. The bridge lifting and lowering mechanism of the mechanized bridge according to claim 1, characterized in that The stopper (1) includes a clamping block (11). The clamping block (11) limits the upward movement of the picked-up bridge span (13) in the vertical direction, and the hook plate (8) limits the downward movement of the picked-up bridge span (13) in the vertical direction.

3. The bridge-picking and bridge-lowering mechanism of the mechanized bridge according to claim 2, characterized in that, The stopper (1) further includes mounting seats (10). Two mounting seats (10) are fixed on the other two opposite sides of the flipping mechanism (3), and the two opposite sides are perpendicular to the side where the brackets (4) are located. The clamping block (11) is fixedly connected to the mounting seats (10).

4. The bridge lifting and lowering mechanism of the mechanical bridge according to claim 1, 2 or 3, characterized in that A limit protrusion is provided at the end of the opposite end of the end of the hook plate (8) fixed to the bracket (4).

5. The bridge lifting and lowering mechanism of the mechanized bridge according to any one of claims 1-3, characterized in that, Also comprising: A bridge-lowering steel wire rope (12) and a bridge-unfolding steel wire rope (14). One ends of both the bridge-lowering steel wire rope (12) and the bridge-unfolding steel wire rope (14) are connected to the bridge span (13), and the other ends are both connected to the flipping mechanism (3).

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